ass

noun

1. Any of several species of horse-like animals, especially Equus asinus, the domesticated of which are used as beasts of burden.

   “And Iesse tooke an asse laden with bread, and a bottle of wine, and a kid, and sent them by Dauid his sonne vnto Saul.”

   “Thus the Aſſe having a peculiar mark of a croſſe made by a black liſt down his back, and another athwart, or at right angles down his ſhoulders; common opinion aſcribes this figure unto a peculiar ſignation; ſince that beaſt had the honour to bear our Saviour on his back.”

   “[…] suddenly a man, in foreign garments: wonderfully real and distinct to look at: stood outside the window, with an axe stuck in his belt, and leading an ass laden with wood by the bridle.”

   “Pliny the Elder states that, to increase sexual potency, the right testis of an ass should be worn in a bracelet.”

   “In this section "animal" means any horse, cattle, ass, mule, sheep, pig, goat or dog.”

2. (often, vulgar)A stupid or inconsiderate person.

   “Near-synonyms: fool, idiot, jerk, asswipe; see also Thesaurus:jerk”

   “That new kid left the cap off the syrup bottle again! What an ass.”

   “He is such an ass for leaving the house door open.”

   “Oh Vengeance! / Who? What an Aſſe am I?”

   “I had sprung to my feet. I was speaking, and yet I had prepared no words. Tarp Henry, my companion, was plucking at my skirts and I heard him whispering, "Sit down, Malone! Don't make a public ass of yourself."”

3. (obsolete, slang)A compositor.

   “Sometimes by way of joke, and sometimes by way of irritation, compositors are called Asses by the pressmen.”

4. (US, countable, slang, uncountable, vulgar)The buttocks.
5. (US, countable, slang, uncountable, vulgar)The anus.

   “Train compartment: two sick young junkies on their way to Lexington tear their pants down in convulsions of lust. One of them soaps his cock and works it up the other's ass with a corkscrew motion.”

   “That does it! Now listen! Why is it that everything today has involved things either going in or coming out of my ass? I’m sick of it! It’s completely immature!”

6. (US, slang, uncountable, vulgar)Sex; a person to have sex with; with vulgar emphasis on their corporeality (their body) over their personhood.

   “I'm going to go down to the bar and try to get me some ass.”

   “piece of ass”

   “Acid, booze, and ass / Needles, guns, and grass”

7. (US, slang, uncountable, vulgar)Used in similes to express something bad or unpleasant.

   “I feel like ass today.”

   “This room smells like ass.”

   “What a load of ass.”

8. (US, countable, slang, vulgar)A person; the self; (reflexively) oneself or one's person, chiefly their body.

   “Get your lazy ass out of bed!”

   “We risk our asses out there every day.”

   “I'ma get medieval on your ass!”

   “"All these thugs better get their mind right and their ass out of our country before January 20th," Higgins wrote.”

9. (US, broadly, countable, slang, uncountable, vulgar)A person; the self; (reflexively) oneself or one's person, chiefly their body.

   “Mess up one more time and it's your ass on the line.”

10. (abbreviation, alt-of, initialism)Initialism of argininosuccinate synthase.
11. (abbreviation, alt-of, initialism)Initialism of antisynthetase syndrome.

adj

1. (Canada, US, not-comparable, slang, vulgar)Of low quality; bad.

   “On a recent episode of "The Justin Dunning Podcast," Starkel shared his thoughts on Martell, a former Ohio State quarterback, saying "he's ass my dude" in reference to Starkel.”

   “For some reason, the teenager thought it’d be a good idea to criticize Newton and say he's "ass" and that he’s "about to be poor" because he's a free agent.”

   “"You're so ass," Murray says to another player.”

particle

1. (US, slang, vulgar)Synonym of -ass (used to intensify an adjective).

   “That was one big ass fish!”

   “That's an expensive ass car!”